The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 315
e onits opposite sides being unequal on account of its posi-tion being at the side of the central line of the carbonsas shown below. When a direct current is employed, as shown by the 298 DYNAMIC ELECTRICITY AND MAGNETISM. -j- and — signs in Fig. 93, a crater is formed in the uppercarbon and a… … Fig. 93. projection burns away the arc shifts to the next lowestpoint and thus travels continuously round the craterabove, as if pivoted on the point of the lower carbon. The Crater and Point.—The formation of the crater isdue, in part, to the checking of the current and conse-quent accumulation of…
Electricity · Magnetism
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